linux-kernel - Re: [PATCH] lib: rename TEST_MODULE to TEST

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Date:	Tue, 23 Sep 2014 10:11:49 -0700
From:	Randy Dunlap <rdunlap@...radead.org>
To:	Valentin Rothberg <valentinrothberg@...il.com>
CC:	akpm@...ux-foundation.org, linux-kernel@...r.kernel.org,
	pebolle@...cali.nl
Subject: Re: [PATCH] lib: rename TEST_MODULE to TEST_LKM

On 09/23/14 10:10, Valentin Rothberg wrote:
> On mar., 2014-09-23 at 09:49 -0700, Randy Dunlap wrote:
>> On 09/22/14 23:58, Valentin Rothberg wrote:
>>> The "_MODULE" suffix is reserved for tristates compiled as
>>> loadable kernel modules (LKM). The "TEST_MODULE" feature thereby
>>
>> Is that documented anywhere?
> 
> Sadly this is not made explicit, but the Kconfig code documents it. The
> following code (./scripts/kconfig/confdata.c) is used to generate the
> autoconf.h header file during the build process. When a feature is
> selected as a kernel module ('m'), it is suffixed with "_MODULE" to
> indicate it. 
> 
> »   »   switch (*value) {
> »   »   case 'n':
> »   »   »   break;
> »   »   case 'm':
> »   »   »   suffix = "_MODULE";
> »   »   »   /* fall through */
> 
>> Was this causing some kind of problem or error?  Please tell us what that was if so.
> 
> It causes problems for static code analysis, which assumes a consistent
> use of the "_MODULE" suffix. 
> 
> Another possible change would be to rename the reference in the Makefile
> to "TEST_MODULE_MODULE". Personally, I prefer my proposed patch.

Sure, your patch is fine, but we need to know *why* the patch is needed.

Thanks.

>>
>>
>>> violates this convention. The feature is used to compile the
>>> lib/test_module.c kernel module.
>>>
>>> This patch renames the feature and its reference in a Makefile
>>> to "TEST_LKM", which still expresses the test of a LKM.
>>>
>>> Signed-off-by: Valentin Rothberg <valentinrothberg@...il.com>
>>> ---
>>>  lib/Kconfig.debug | 2 +-
>>>  lib/Makefile      | 2 +-
>>>  2 files changed, 2 insertions(+), 2 deletions(-)
>>>
>>> diff --git a/lib/Kconfig.debug b/lib/Kconfig.debug
>>> index 07c2832..db91c97 100644
>>> --- a/lib/Kconfig.debug
>>> +++ b/lib/Kconfig.debug
>>> @@ -1627,7 +1627,7 @@ config DMA_API_DEBUG
>>>  
>>>  	  If unsure, say N.
>>>  
>>> -config TEST_MODULE
>>> +config TEST_LKM
>>>  	tristate "Test module loading with 'hello world' module"
>>>  	default n
>>>  	depends on m
>>> diff --git a/lib/Makefile b/lib/Makefile
>>> index d6b4bc4..382437a 100644
>>> --- a/lib/Makefile
>>> +++ b/lib/Makefile
>>> @@ -31,7 +31,7 @@ obj-y += string_helpers.o
>>>  obj-$(CONFIG_TEST_STRING_HELPERS) += test-string_helpers.o
>>>  obj-y += kstrtox.o
>>>  obj-$(CONFIG_TEST_KSTRTOX) += test-kstrtox.o
>>> -obj-$(CONFIG_TEST_MODULE) += test_module.o
>>> +obj-$(CONFIG_TEST_LKM) += test_module.o
>>>  obj-$(CONFIG_TEST_USER_COPY) += test_user_copy.o
>>>  obj-$(CONFIG_TEST_BPF) += test_bpf.o
>>>  obj-$(CONFIG_TEST_FIRMWARE) += test_firmware.o


-- 
~Randy
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